33.0" tall, 11.2" wide, 4.5" sidewall
A 285/40R24 tire is 33.0 inches (838 mm) tall and 11.2 inches wide. The sidewall is 40% of the width, 4.5 inches, on a 24-inch wheel, and the tire turns about 612 times per mile.
In flotation terms that is about 33.0x11.2R24. People often call it a 33-inch tire.
The size most often compared with it is 305/35R24, which is 0.6" shorter (−1.7%). At an indicated 60 mph you would be doing 59.0 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 24" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 285/40R24 | |
|---|---|---|---|---|---|
| 295/40R24 | 33.3" | 11.6" | 4.6" | +1.0% | |
| 305/35R24 | 32.4" | 12.0" | 4.2" | −1.7% | compare |
| 305/40R24 | 33.6" | 12.0" | 4.8" | +1.9% | |
| 285/35R24 | 31.9" | 11.2" | 3.9" | −3.4% | |
| 275/35R24 | 31.6" | 10.8" | 3.8" | −4.2% | |
| 295/45R24 | 34.5" | 11.6" | 5.2" | +4.5% | |
| 305/45R24 | 34.8" | 12.0" | 5.4" | +5.6% | |
| 295/30R24 | 31.0" | 11.6" | 3.5" | −6.1% | |
| 275/30R24 | 30.5" | 10.8" | 3.2" | −7.5% |
Sizes within 2% of 33.0" on 22" wheels.
| Size | Diameter | Width | Sidewall | vs 285/40R24 | |
|---|---|---|---|---|---|
| 33x12.50R22 | 33.0" | 12.5" | 5.5" | +0.1% | |
| 305/45R22 | 32.8" | 12.0" | 5.4" | −0.5% | |
| 315/45R22 | 33.2" | 12.4" | 5.6" | +0.6% | |
| 285/50R22 | 33.2" | 11.2" | 5.6" | +0.7% | |
| 295/45R22 | 32.5" | 11.6" | 5.2" | −1.6% | |
| 325/45R22 | 33.5" | 12.8" | 5.8" | +1.6% |
Actual speed when the speedometer is calibrated for 285/40R24.
| Speedometer shows | on 305/35R24 | on 295/40R24 | on 305/40R24 |
|---|---|---|---|
| 30 mph | 29.5 mph | 30.3 mph | 30.6 mph |
| 45 mph | 44.2 mph | 45.4 mph | 45.9 mph |
| 60 mph | 59.0 mph | 60.6 mph | 61.1 mph |
| 70 mph | 68.8 mph | 70.7 mph | 71.3 mph |
33.0 inches (838 mm). The sidewall is 4.5 inches.
11.2 inches (285 mm) section width, measured sidewall to sidewall.
About 33.0x11.2R24.
305/35R24 is −1.7% in diameter, within the common 3% guideline. It is 0.8" wider.